in HS- the Muppets, inside the Animation studios is a great place to rest inside for a while. Over by the backlot tour, there is an outdoor restaurant. It is not inside, but it has huge fans that will cool you off if you need somewhere to sit. Also, the writer’s stop has huge comfy chairs inside, like bookstore if you need somewhere really comfortable to sit inside.
The park I would worry about most is AK… GO early and leave early. there is a great place there down by Kali River Rapids- keep going past the entrance to it, and on the left there is an outdoor restaurant with huge fans, and shade. We sat there while people were riding Kali, and we were refreshed when it was time to go… That park is huge, hot and not very shady- but fun… and I could ride the safari (but I was 5 months,not 37 weeks). Ask away if there are more questions.